- Ring wrench for bleed valves. Required Spare Parts:
- Brake Fluid Specification SAE J 1703, DOT 3.
Brake fluid absorbs moisture from the air through the pores in the hoses and through the vent hole of the expansion tank. Because of this, the boiling point of the brake fluid decreases during operation. With a strong impact on the brakes, this can lead to the formation of vapor locks in the brake pipes, due to which the braking performance is greatly reduced.
Brake fluid should be changed every 2 years, preferably in the spring. When driving frequently in the mountains, the brake fluid should be changed more frequently.
Observe the rules for handling brake fluid, see Chapter Brake system.
1. Pump out the brake fluid from the expansion tank by suction to a level of 10 mm.
Attention! Do not empty the expansion tank completely so that air does not enter the brake system.
2. Fill the expansion tank new brake fluid up to the mark "max".
Attention! Open the bleed valves on the wheel cylinders and calipers carefully so as not to twist them. It is recommended that the valves be coated 2 hours before priming with a rust remover. With firmly seated valves, bleed in the workshop.
3. Attach a clean hose to the bleed valve on the right rear support, substitute a suitable vessel.
4. Ask an assistant to pump the brake pedal several times until pressure is created, keep the brake pedal depressed, open the bleeding valve. Keeping your foot on the pedal, close the valve. Take your foot off the pedal. Repeat this procedure on each valve until only new brake fluid comes out.
5. Close the bleed valve, fill the expansion tank new brake fluid.
6. In the same way, pump out the old brake fluid from the remaining calipers or cylinders in the sequence - rear right, rear left, front right, front left.
Attention! The escaping brake fluid must be clear and free of bubbles.
7. Old brake fluid should be taken to a special point.